Shower basin



FIG. 1 is a top plan view of a shower basin.

FIG. 2 is a cross-sectional right side elevation view of the shower basin of FIG. 1, taken on the line 2-2 in FIG. 1.

FIG. 3 is a cross-sectional rear elevation view of the shower basin of FIG. 1, taken on the line 3-3 in FIG. 1.

FIG. 4 is an isometric view of the shower basin of FIG. 1.

FIG. 5 is another isometric view of the shower basin of FIG. 1.

Portions of FIGS. 1 through 5 are shown in evenly-spaced broken lines and dash-dot-dot-dash lines depicting environmental subject matter forming no part of the claimed design. The appearance of any portion of the shower basin between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a shower basin, as shown and described. 